Window-sash lock.



T. J. BLOSICK.

WINDOW SASH LOCK.

APPLICATION-FILED JULY 7, 1915.

Patented NOV.. 1915.

2 SHEETS-SHEET 1.

' anon fez 7. :[5/06264 l 176 h lfhsaes T. J. BLOSICK. v

WINDOW SASH LOCK. APPLICATION FILED lULY 1.1915.

1 ,1 61,597. Patented Nov; 23, 1915.

2 SHEETS-SHEET 2.

W5 F1 7J7 attozucm if. @FFF THOMAS J. erosion, or SHANIKO, OREGON, ASSIIGNOR or ONE-FOURTH TO Jar/ins w. FISHER, or SI-IANIKO, onneon.

WINDOW-SASH LOCK.

Specification of Letters Patent.

Patented Nov. 23, 1915.

Application filed July 7, 1915. Serial No. 32,551.

To all whom it may concern:

Be it known that I, THoMAs J. BLosIoK, a citizen of the United States, residing at Shaniko, in the county of Wasco, 'State of Oregon, have invented certain new and useful Improvements in WVindow-Sash Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to window sash looks.

The object of the invention is to provide a window sash lock embodying an improved construction whereby the lock may be adjusted to conform to shrinkage of the window sash, and which will act as a balance to assist in raising the sash.

A further object of. the invention is to provide a window sash 1001: which will be simple in construction, efficient in use, easily operated, and which can be manufactured at a comparatively small cost.

With the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claim.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which- Figure 1 is a front elevation of a window sash showing the improved lock applied, the near side of the lock casing being removed and the sash being shown in section; Fig. 2, a section on the line 2-2 of Fig. 1; Fig. 3, a section on the line 33 of Fig. 1; Fig. 4, a rear view of the lock; Fig. 5, a section on the line 55 of Fig. 4; Fig. 6, a section on the line 66 of Fig. 4; Fig. 7 a section on the line 7 7 of Fig. 1; and Fig. 8, a section on the line 8-8 of Fig. 1.

Referring to the drawings 10 indicates the window sash and 11 the window frame. The edge of the sash adjacent the frame 11 has mounted thereon in any suitable manner a rack 12 which constitutes a part of the look as will hereinafter appear. The portion of the lock carried by the window frame 11 is indicated generally at A and is shown mounted in a recess 13 formed in the frame for the purpose of receiving the lock.

That portion of the lock mounted in the recess 13 is shown as comprising spaced side plates 14 and 15 and a face plate 16 provided with an opening 17 for a purpose that will presently appear. Mounted between the side plates 14 and 15 is a non-rotatable shaft 18 upon which is rotatably mounted a gear 19. Fixed to the gear 19 at one side of the latter and provided with an extended hub 20 is a ratchet wheel 21. Encircling the hub 20 and having one end thereof secured to the hub 20 and its other end to a bar 22 mounted between the side plates 14 and 15 is a'spiral spring 23. By this construction it will be obvious that rotation of the gear 19 in one direction will energize the spring 23. Pivotally mounted on the shaft 18 are arms 24 and 25 and the free ends of these arms are connected by a bar 26 which is rotatably mounted between the arms. Rotatably engaged through the face plate16 and threaded in the bar 26 is a screw 27. This screw is also slidably engaged through a bracket 28 mounted between the side plates 14 and 15. The inner end of the screw 27 hasmounted' thereon a washer 29 and encircling the screw is a spring 30 one end of which bears against the washer and the other end against the bracket 28. This spring serves to normally hold the screw 27 at the limit of its movement inwardly of the face plate. By rotating the screw 27 it will be obvious that the arms 24 and 25 can be swung on their pivots. The swinging movement of the arms 24 and 25 is limited by means of extensions 31 of a bar 26 rotatably mounted in the arms 24 and 25 and engaged in slots 32 formed respectively in the arms 24 and 25. Fixed on the bar 26 is a gear 34 which meshes with the gear 19. This gear 34 works through the opening 17 during swinging of the arms 24 and 25 and is adapted to mesh with the rack 12 on the window sash. By providing for the adjustment of the gear 34 in the manner previously described it will be obvious that the cooperative engagement between said gear adapted for cooperation with the ratchet wheel 20 to lock said ratchet wheel and of coursethe gears 19 and 34-against rotation. Secured to the lower end of thepawl 36 is one end of a rod 37 which is slidable in a bracket 38 secured to the side plate 14. Encircling the rod 37 is a spring 39 one end of which bears against the lower end of the pawl 36 and the other end against the bracket 38. This spring constantly tends to hold the pawl 36 in locking relation tothe ratchet Wheel 20'as will be obvious. Movement of the pawl 36 under the influence of the spring 39 is limited by means of a guide bracket40'secured to the sideplate 15.

In order to move the pawl 36 to released positionagainst the influence of the spring 39 there is slidably mounted in the plates 14 and 15 a member 41 and fixed upon this 7 member is a block 42having a beveled projection 43 adapted for cooperation with the the: ratchet wheel 20. By forcing the memlower end of the pawl 36'. This block 42 is slidably engaged on guide rods 44 and encircling each rod. 44 is a spring 45 one end of" which bears against the side plate 14 and the other against the block 42; These springs 45' constantly tend to'hold the block in positionto'permit the pawl 36 to be disposed normally in locked position with respect to her 41 longitudinally against the influence of the springs 45 the beveled projection 43 will engage the lowerend: of the pawl 36 and move said pawl torelease position against the influenceof the spring 39.

' -In operation it will'benoted that when the Window sash is down the spring 23 will be energized so as to act as a balance and assist in raising thesash. Normally the sash is locked owing to the fact that the pawl 36 normally locks the ratchet wheel 20 against rotation. If it is desired to raise the sash it is only necessary to move the member 41 longitudinally and operate the pawl 36 to release position. The sash can then be raised. Upon release of the member 41 the sash is automatically locked in the desired position. In lowering the sash the spring23-is again energized so as to be ready to assist the next raisingof the sash.

- What is claimed is In a. sash lock the combination with a window frame and sliding sash, of a rack mounted on the sash, a casing mounted in the frame, anon rotatable shaft mounted in thecasing, a gear rotatably mounted on said shaft, a ratchet wheel secured to the gear for rotation therewith, spaced arms pivota'lly mountedon said shaft, means for pivotally adjusting said arm, a pinion rotatably. mounted between the arms and meshing; witlr the gear and rack, a pawl mounted in the casing andnormally engaging the ratchet wheeli to lock the latter againstirotation, and means for disengaging said pawl from said ratchet wheel.

Intestimony whereof, I afiix my signatune, in thepresence of two witnesses.

THOMAS J. BLOS'I CIQ Witnesses:

Roy R. WHEELEIQ HOWARD M. Wmsn.

cppiesiof thispatenc niay 'be; obtainedior five cents each; By addressing: the Commissioner of Patents,

I I Washington, D. C. 

